752/135U Ultrasonic Motion Detector, 22554 - Clipsal

Ultrasonic 

Motion Detector 

752/135U 

Installation Instructions 

22554 F1454-02 752-135U Instruction.indd 1 23/02/2011 3:20:15 PM

752/135U Ultrasonic Motion Detector Installation Instructions 

Table of Contents 

1.0 Introduction .....................................................................................................3 

2.0 How it Works ....................................................................................................3 

2.1 Ultrasonic Detection...................................................................................3 

3.0 Identification of Parts .....................................................................................4 

3.1 Detector .....................................................................................................4 

3.2 Power Supply .............................................................................................4 

4.0 Location ............................................................................................................5 

5.0 Detection Pattern .............................................................................................5 

6.0 Mounting Procedure ........................................................................................6 

7.0 Wiring Diagram ................................................................................................6 

8.0 Commissioning ................................................................................................7 

9.0 Logic Bypass Function ...................................................................................7 

10.0 Technical Specifications .................................................................................8 

11.0 Troubleshooting ...............................................................................................9 

12.0 Notes ......................................................................................................... 10-11 

13.0 Warranty ........................................................................................................12 

© Clipsal Australia Pty Ltd 



1.0 Introduction 

The Clipsal 752/135U Motion Sensor uses ultrasonic technology to perform 

the ultimate task of sensing. 

2.0 How it Works 

2.1.Ultrasonic Detection 

The 752/135U consists of 2 transmitters and 2 receiver transducers to provide total 

volumetric sensing with no blind spots. 

The sensor operates on 24V d.c. and is designed to work with the 752PR power 

and relay switching module (supplied). 

When someone enters a room in which the sensor controls the lighting the lights 

turn on automatically, and in this manner the load can be controlled. The signal 

derived activates an adjustable timer (30 seconds to 30 minutes), which in turn 

activates an electrical relay in the power pack, turning the lights on. 

If no movement or presence is detected for the time selected, the relay 

de-energises, turning the lights and load off. 

The 752PR device has a C-Bus auxiliary unit connection terminal which is to be 

connected only to a C-Bus L5504AUX or C-Bus bus coupler unit. 


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3.0 Identification of Parts 

3.1 Detector 

3.2 Power Supply 

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Cut out to suit 

load cable 

Incoming Mains 

Supply Cable 

Load Output 

Terminals 

Cover 

PCB Fixing Screws 

752LD Lead 

Connector for 752LD 

(lead to sensor) 

Output for connection 

to C-Bus bus coupler 

or auxiliary unit 

Base 




4.0 Location 

The best position to mount the sensor is on the ceiling in the centre of the room. It 

has a nominal coverage of 15m x 15m (225m 2 ) with 360° coverage. 

A B 

Plan of Room (example) 

Best position 

Note: Do not mount close to objects which can change temperatures rapidly e.g. 

air-conditioning vents, heater flues. 

5.0 Detection Pattern 

Detection and range pattern 

4.5m 

3m 

Mounted in hallway with 3m ceiling 


30m 

Mounted in stockroom 6m above floor 

Plan of Room (example) 

Incorrect positions 



6m 9m 9m 

6m 

Forklift detection Walking detection 

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6.0 Mounting Procedure 

1. Fit power supply in ceiling space within 1m of sensor position. (Fit surface mount 

socket or similar for supply from lighting circuit.) 

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a. Fix base of power supply to beam. 

b. Fix PCB to base using screws provided. 

c. Fit 752LD (one metre lead) to connector on PCB at extra low voltage end. 

d. Fit load cables to terminals on PCB, stripped to length as shown. 

e. Cut out cover as required to suit load cables. 

f. Screw cover to base. 

2. Fit sensor to ceiling in (a predetermined) position. 

a. Fix mounting flange to ceiling. 

b. Cut hole for 752LD lead cable (Ø20mm hole). 

c. Fit 752LD lead to sensor. 

d. Fix sensor to mounting flange and secure using side fixing screws. 

7.0 Wiring Diagram 

Hard wired 

incoming 

mains 

Warning 

AEN 

LIGHTING LOAD 

SW A E N 

752PR Module 

Mains Side Extra Low 

Voltage Side 

Switched 

Control 

Active A 

B 

752LD LEAD 

6 Way Cable (1m) 


Sensor Head 

20mm 9mm 

Output for 

connection to 

C-Bus auxiliary 

unit L5504AUX 

or bus coupler 

It is recommended that this product should be hard wired as per the wiring diagram. 

When connecting multiple 752PR modules to control the same load, 3 pin plugs or 

similar must not be used, as this can result in the plugtop pins becoming ‘live’ under 

certain conditions. 

For safety reasons, it is recommended to always shut down power to all relevant 

circuits before undertaking any installation or maintenance of this product. 




8.0 Commissioning 

Once power has been installed, determine which sensitivity setting and time delay 

best suits the application. 

Time Delay Tables 

Example of timer settings in minutes 

Stock Room =# 15 

Hallways =# 10 

Restroom =#7 

Office =#8 

Classroom =#9 

9.0 Logic Bypass Function 

Note: When logic key or paper clip is inserted into the slot, lights will always be 

on. There is no shock hazard present when using a logic key or a paper clip. This 

bypass function is for emergency use only. 


Approximate Sensitivity Adjustment 

3m on each side =#2 





Note: When making adjustments do not attempt to force adjustment 

screw past limits. 

SENSITIVITY BY PASS MINUTES 

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10.0 Technical Specifications 

Model 752/135U Ultrasonic Motion Detector. 

Time Delay Adjustment Variable from approximately 30 seconds 

to 30 minutes. 

Coverage 360° (walking) = 4.5m x 30m (Note: mounted in 

room with 3m ceiling height). 

Room Size Adjustment Sensitivity adjustment for ultrasonic detection. 

Bypass Override Function Logic key or paper clip. Only for emergency use. 

Walk Test Indicator Red LED = Ultrasonic. 

Ambient Ranges Operating Temperature = (0°C to 50°C) 

Humidity - 0-95% RH non-condensing. 

Colour White 

Enclosure High-impact U.L. approved material with base to 

comply with all flammability rating standards. 

Description 72mm x 127mm x 35mm. Weight 160g. 

752 Power Supply and Switched Module (752PR) 

Operating Voltage Range 192V a.c. min.- 265V a.c. max. 

Rated Nominal Voltage 240V a.c. 

Operating Frequency 50Hz 

Output Power 7VA max. @ 240V 

Unfiltered d.c. Voltage Output @ 240V 

a.c. Input (no load) 

24V max. 

Continuous d.c. Load Current Allowed 100mA max. 

Switched Active Contact Rating (N.O.) 240V a.c. 10AX max. suitable for fluorescent, 

inductive and incandescent loads. 

C-Bus Output Connection Compatible with C-Bus bus coupler or 

auxiliary unit. 

Operating Temperature Range 0°C min. - 50°C max. 

Number of 752 Series Motion 

Detectors allowed to connect 

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One 




11.0 Troubleshooting 

Problem The power is restored and the red and LED does not blink 

when making motion. 

Solution A Adjust sensitivity and set level to a higher setting as required by 

observing red LED. 

Solution B Remove sensor and measure if 24V d.c. is present between 

red and black leads. If no voltage is present, check power 

connection and power/switch pack. If voltage is present, replace 

sensor with new one and send defective sensor to Clipsal 

Australia Pty Ltd. 

Problem Lights are on continuously and do not shut off when no 

one is present. 

Solution Re-check all your connections then disconnect sensor while 

power is still on. If lights remain on, this indicates that there 

is a short in the 752LD Lead connecting the sensor and the 

power/switch module. Solution to this problem is to replace the 

752LD Lead. Check also for external causes such as excessive 

turbulence (hanging mobiles, etc). 

Problem Lights will not switch on even after sensor is disconnected 

and red and blue wires are shorted. 

Solution This could indicate a broken wire in the 752LD Lead. Next, 

disconnect the 752LD Lead at the power/switch module and 

short the pins where the red and blue wires connect. If lights 

still do not switch on, replace power/switch module after 

checking if all connections were made correctly. 

Problem LED blinks but lights will not switch on. 

Solution Check if sensor is working when bypassing all electronics. This 

can be done by inserting the key provided with each unit. If 

lights switch on, replace defective sensor. 

Problem After all connections are verified, lights stay on when no 

one is present, and from time to time LED blinks. 

Solution Turn sensitivity adjustment to a lower setting and/or physically 

rotate sensor by 90° 


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12.0 Notes 

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12.0 Notes 


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13.0 Warranty 

1) The benefits conferred herein are in addition to, and in no way shall be deemed to derogate; 

either expressly or by implication, any or all other rights and remedies in respect to Clipsal 

Product, which the consumer has under the Commonwealth Trade Practices Act or any other 

similar State or Territory Laws. 

2) The warrantor is Clipsal Australia Pty Ltd of 33-37 Port Wakefield Road, Gepps Cross, SA 

5094. With registered offices in all Australian States. 

3) This Clipsal Product is guaranteed against faulty workmanship and materials for a period of 

two (2) years from the date of installation. 

4) Clipsal Australia Pty Ltd reserves the right, at its discretion, to either repair free of parts 

and labour charges, replace or offer refund in respect to any article found to be faulty due to 

materials, parts or workmanship. 

5) This warranty is expressly subject to the Clipsal Product being installed, wired, tested, 

operated and used in accordance with the manufacturer’s instructions. 

6) All costs of a claim shall be met by Clipsal Australia Pty Ltd, however should the product 

that is the subject of the claim be found to be in good working order, all such costs shall be 

met by the claimant. 

7) When making a claim, the consumer shall forward the Clipsal Product to the nearest office 

of Clipsal Australia Pty Ltd with adequate particulars of the defect within 28 days of the fault 

occurring. The product should be returned securely packed, complete with details of the date 

and place of purchase, description of load, and circumstances of malfunction. 

For all warranty enquiries, contact your local Clipsal sales representative. The address and contact 

number of your nearest Clipsal Australia office can be found at http://www.clipsal.com/locations 

Clipsal Australia Pty Ltd 

A member of Schneider Electric 

Contact us: clipsal.com/feedback 

National Customer Care Enquiries: 

Tel 1300 2025 25 

Fax 1300 2025 56 

F1454/02 10339251 

clipsal.com 

Clipsal Australia Pty Ltd reserves the right to change 

specifications, modify designs and discontinue items without 

incurring obligation and whilst every effort is made to ensure that 

descriptions, specifications and other information in this catalogue 

are correct, no warranty is given in respect thereof and the 

company shall not be liable for any error therein. 

© Clipsal Australia Pty Ltd. The identified trademarks and 

copyrights are the property of Clipsal Australia Pty Ltd unless 

otherwise noted. 

CLIPCOM 22554 February 2011

752/135U Ultrasonic Motion Detector, 22554 - Clipsal

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